<s:if test="%{#session.operation_message!=null}">
                        <div class="row-fluid">
                        <div class="span12">
                            <div class="alert alert-success">
                                <button type="button" class="close" data-dismiss="alert">&times;</button>
                                <s:property value="%{#session.operation_message}"/>
                            </div>
                          </div>
                          </div>                            
</s:if>